/ Thesaurus / R Synonyms of rock barnacle Find synonyms for: Noun1. acorn barnacle, rock barnacle, Balanus balanoides, barnacle, cirriped, cirripedeusage: barnacle that attaches to rocks especially in intertidal zonesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: coincidence Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language